Speaker



FIG. 1 is a front perspective view of a speaker in accordance with our new design;

FIG. 2 is rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a left side view thereof, the right side view being a mirror image.

The broken line showing on the drawing disclosure is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a speaker, as shown and described. 